Branch 1 tasktracker - aajisaka/hadoop-metrics GitHub Wiki

• maps_running
  • Current number of running map tasks on the TaskTracker
• reduces_running
  • Current number of running reduce tasks on the TaskTarcker
• mapTaskSlots
  • Total number of map task slots on the TaskTracker
• reduceTaskSlots
  • Total number of reduce task slots on the TaskTracker
• failedDirs
  • Total number of TaskTracker-local directory failures
• tasks_completed
  • Total number of completed tasks.
• tasks_failed_timeout
  • Total number of failed tasks by not reporting progress for a specific period
• tasks_failed_ping
  • Total number of failed tasks by child JVM failed to ping TaskTracker

For more details, see org.apache.hadoop.mapred.TaskTrackerMetricsSource.java.